Where is transparent view in blender 2.81
The shortcut Z to show the shading pie menu still exists in Blender 2.81 and 2.82. However it's 4 to enable Wireframe mode, 2 is for the Material Preview mode.



You can also enable Wireframe mode by clicking on its icon.





If you're referring to the X-ray mode, it can either be toggled through Alt+Z or by clicking on its icon.